31231121970959 has 2 divisors, whose sum is σ = 31231121970960. Its totient is φ = 31231121970958.

The previous prime is 31231121970943. The next prime is 31231121971009. The reversal of 31231121970959 is 95907912113213.

It is a weak prime.

It is an emirp because it is prime and its reverse (95907912113213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31231121970959 - 2⁴ = 31231121970943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31231121970959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31231121972959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615560985479 + 15615560985480.

It is an arithmetic number, because the mean of its divisors is an integer number (15615560985480).

Almost surely, 2^{31231121970959} is an apocalyptic number.

31231121970959 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231121970959 is an equidigital number, since it uses as much as digits as its factorization.

31231121970959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 918540, while the sum is 53.

The spelling of 31231121970959 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-one million, nine hundred seventy thousand, nine hundred fifty-nine".